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प्रश्न
Explain the following:
Silica is added to the sulphide ore of copper in the reverberatory furnace.
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उत्तर
Copper pyrites contain iron sulphide in addition to copper sulphide. In the reverberatory furnace copper ore is roasted to give oxides. \[\ce{FeO}\] is removed by adding silica from the matte containing \[\ce{Cu2S}\] and \[\ce{FeS}\].
\[\ce{2FeS + 3O2 -> 2FeO + 2SO2}\]
\[\ce{Feo + SiO2 -> \underset{(Slag)}{FeSiO3}}\]
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संबंधित प्रश्न
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Write down the reactions taking place in Blast furnace related to the metallurgy of iron in the temperature range 500-800 K.
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\[\ce{CO2}\] is a better reducing agent below 710 K whereas \[\ce{CO}\] is a better reducing agent above 710 K.
Explain the following:
Generally sulphide ores are converted into oxides before reduction.
Explain the following:
Carbon and hydrogen are not used as reducing agents at high temperatures.
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\[\ce{Au + CN^- + H2O + O2 -> [Au(CN)2]^- + OH^-}\]
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